diff --git a/docs/cli-client/token.md b/docs/cli-client/token.md
index 674700bace..8ac574be45 100644
--- a/docs/cli-client/token.md
+++ b/docs/cli-client/token.md
@@ -5,12 +5,13 @@ Token module allows you to manage assets on IRIS Hub
 ## Available Commands
 
 | Name                                       | Description                                |
-| ------------------------------------------ | ------------------------------------------ |
+|--------------------------------------------|--------------------------------------------|
 | [issue](#iris-tx-token-issue)              | Issue a new token                          |
 | [edit](#iris-tx-token-edit)                | Edit an existing token                     |
 | [transfer](#iris-tx-token-transfer)        | Transfer the ownership of a token          |
 | [mint](#iris-tx-token-mint)                | Mint tokens to a specified address         |
 | [burn](#iris-tx-token-burn)                | Burn some tokens                           |
+| [swap-fee](#iris-tx-token-swap-fee)        | Swap one token with another token          |
 | [token](#iris-query-token-token)           | Query a token by symbol                    |
 | [tokens](#iris-query-token-tokens)         | Query tokens by owner                      |
 | [fee](#iris-query-token-fee)               | Query the token related fees               |
@@ -122,6 +123,19 @@ iris tx token mint [symbol] [flags]
 | --to     | string |          |         | Address to which the token will be minted, default to the owner address |
 | --amount | uint64 | Yes      | 0       | Amount of the tokens to be minted                                       |
 
+## iris tx token swap-fee
+
+Swap one token with another token. For example, this feature can be used to exchange `IRIS` for `ERIS`.
+
+```bash
+iris tx token swap-fee [fee_paid] --to [reciever]
+```
+**Flags:**
+
+| Name     | Type   | Required | Default | Description                               |
+| -------- | ------ |----------| ------- |-------------------------------------------|
+| --to     | string | Yes      |         | Address to which the token will be swaped |
+
 ### Mint Token
 
 ```bash
diff --git a/docs/get-started/evm-contract.md b/docs/get-started/evm-contract.md
index 3bf23524d6..4134078c34 100644
--- a/docs/get-started/evm-contract.md
+++ b/docs/get-started/evm-contract.md
@@ -64,8 +64,8 @@ Open the Metamask extension on your browser, you may have to log in to your Meta
 
 Then click the top right circle and go to `Settings > Networks`. Press the `Add Network` button and fill the form as the example below with your application ChainID:
 
-- Network Name: IRISHub
-- RPC URL: http://localhost:8545
+- Network Name: IRISHub 2.0
+- RPC URL: https://evmrpc.irishub-1.irisnet.org
 - ChainID: 6688
 - Symbol: ERIS
 
diff --git a/docs/migration/account.md b/docs/migration/account.md
new file mode 100644
index 0000000000..693cd14597
--- /dev/null
+++ b/docs/migration/account.md
@@ -0,0 +1,63 @@
+## Introduction
+
+IRISHub v2.0 changed the generative structure of the entire account system from `auth.BaseAccountProto` to `ethermint.ProtoAccount` , resulting in incompatibility of newly created accounts;
+
+**Note:** **Accounts before the v2.0 upgrade will not be affected and can still be used normally**
+
+**The following content takes nyancat testnet as an example：**
+
+For accounts before the v2.0 upgrade, the query structure through LCD is as follows: https://lcd.nyancat.irisnet.org/cosmos/auth/v1beta1/accounts/iaa1e0rx87mdj79zejewuc4jg7ql9ud2286g2us8f2
+
+```json
+{
+     "account": {
+         "@type": "/cosmos.auth.v1beta1.BaseAccount",
+         "address":"iaa1e0rx87mdj79zejewuc4jg7ql9ud2286g2us8f2",
+         "pub_key": {
+             "@type": "/cosmos.crypto.secp256k1.PubKey",
+             "key":"AiOFJ3Jclq/8y3xV85ALNFuA7FJo1IMoTxYoB3ddMrMr"
+         },
+         "account_number": "1251",
+         "sequence": "12983"
+     }
+}
+```
+
+For accounts upgraded in v2.0, the query structure through LCD is as follows: https://lcd.nyancat.irisnet.org/cosmos/auth/v1beta1/accounts/iaa1g4uak38a8fhkg5v5qky3fc9g6h50yrdcn7waug
+
+```json
+{
+     "account": {
+         "@type": "/ethermint.types.v1.EthAccount",
+         "base_account": {
+             "address":"iaa1g4uak38a8fhkg5v5qky3fc9g6h50yrdcn7waug",
+             "pub_key": {
+                 "@type": "/ethermint.crypto.v1.ethsecp256k1.PubKey",
+                 "key":"AhHKT0xpnrOmpikkd1lEPxiEHG4ngItq06KLhwU2UQHO"
+             },
+             "account_number": "5564",
+             "sequence": "6"
+         },
+         "code_hash": "0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
+     }
+}
+```
+
+
+### Using Proto
+
+A new type needs to be registered, and the type structure is here: https://github.com/bianjieai/ethermint/blob/v0.20.0-irishub-1/proto/ethermint/types/v1/account.proto
+
+When the query structure is `/ethermint.types.v1.EthAccount`, use the new structure analysis;
+
+When the query structure is `/cosmos.auth.v1beta1.BaseAccount`, use the old structure analysis;
+
+You can refer to the core-sdk-go written by the irisnet team. The relevant hash is at: https://github.com/irisnet/core-sdk-go/commit/68ed671727e057edb185935c42710f8777dab62f
+
+### Useing LCD
+
+When parsing, please make compatibility according to the required type;
+
+If the type is `/cosmos.auth.v1beta1.BaseAccount`, use the old structure analysis;
+
+If the type is `/ethermint.types.v1.EthAccount`, use the new structure analysis;
\ No newline at end of file
diff --git a/docs/pics/evm-metamask.png b/docs/pics/evm-metamask.png
index 9e54801deb..36c2e679d9 100644
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